code: def test_mean(self):
      tdi = pd.TimedeltaIndex(["0h", "3h", "NaT", "5h06m", "0h", "2h"])
      arr = tdi._data
  
      # manually verified result
      expected = Timedelta(arr.dropna()._ndarray.mean())
  
      result = arr.mean()
      assert result == expected
      result = arr.mean(skipna=False)
      assert result is pd.NaT
  
      result = arr.dropna().mean(skipna=False)
      assert result == expected
  
      result = arr.mean(axis=0)
      assert result == expected
  
file_path: pandas/pandas/tests/arrays/timedeltas/test_reductions.py
imports: import numpy
  import pytest
  import pandas
  from pandas import Timedelta
  import pandas._testing
  from pandas.core import nanops
  from pandas.core.arrays import TimedeltaArray
label_desc: Use image node_id 9 for calling the TestReductions obj's underlying member method code with example usage: obj.test_mean() without return types